What Does Ink Anti-adhesion Mean?

What does ink anti-adhesion mean? Adhesion refers to the adhesion of the ink layer on the printed product to another contact surface (usually the back of the film) after printing and rewinding, or the ink adheres to another contact surface.

There are two types of adhesion:
One is the adhesion of the back surface of the printed plastic film, usually called “re-adhesion”, which means that the imprint on the film is dry after printing, and the back becomes dirty again during the storage period after the roll is printed or the bag is made.

Specifically, it cannot be unrolled smoothly, or the printed pattern is damaged and the contact surface is polluted due to ink peeling.

When the adhesion is light (the previous stage of adhesion), it is manifested as a peeling sound when rewinding, or an abnormal gloss on the ink surface of the overlapping part.

In severe cases, the printed pieces cannot be torn apart, and the ink layer of the image and text is transferred, resulting in product scrapping.

Second, the surfaces of the plastic tubular film are adhered to each other, the bag mouth is difficult to open, and users refuse to use it.

The above two situations are more likely to occur in summer. High temperature and high relative humidity in the operating workshop are one of the main reasons for adhesion. But sometimes it is related to the low content of lubricant in the PE resin itself, and is also closely related to a series of factors such as air volume and speed. Why should anti-rebound wax emulsion be used for water-based ink printing? Wax emulsion added to the water-based ink system can effectively improve the scratch resistance and wear resistance of the surface of the printed product, resist adhesion, and give the paint film a full and smooth feel. It is widely used in packaging products such as tobacco, alcohol, food, beverages, and toys.

The good or bad control of ink viscosity directly affects most quality problems such as pigment transfer, clogging, glossiness of printed products, adhesion firmness of ink layer, electrostatic repulsion, etc., which greatly affects the yield rate and production efficiency of printed products. In order to effectively solve the viscosity problem in the ink printing process, it is necessary to add 1%~3% polyethylene wax to the ink to change the fluidity of the ink and reduce the viscosity of the system. At the same time, it can improve the smoothness, wear resistance and scratch resistance of the ink, improve hydrophilicity, accelerate fixation, make the printed product dots complete, reduce the disadvantages of agglomeration, plucking, and smudging; and improve the printing performance of the ink.